All LG Mobiles Secret Short Codes

On the main screen type *#06#
Information you get from the IMEI (International Mobile Equipment Identity)
 SP    XXXXXX     XX     XXXXXX    X
 
       TAC      FAC       SNR     SP
TAC = Type approval code of your LG Mobile
FAC = Final assembly code of your cellphone
SNR = Serial number of your LG Phone
SP = Spare

Other secret tricks for LG mobile or cellphone"
  LG all models test mode:
  Type 2945#*# on the main screen.
  2945*#01*# Secret menu for LG
  IMEI and SW (LG 510): *#07#
  Software version (LG B1200): *8375#
  Recount cheksum (LG B1200): *6861# 
  Factory test (B1200): #PWR 668 
  Simlock menu (LG B1200): 1945#*5101# 
  Simlock menu (LG 510W, 5200): 2945#*5101#
  Simlock menu (LG 7020, 7010): 2945#*70001# 
  Simlock menu (LG 500, 600): 2947#*

LG-U81XX SPECIAL CODES
  Code to read phone version : 
  - Phone without SIM
  - Enter 277634#*# or 47328545454#
  - Select 'SW Ver.info'
  
Code to reset phone :
  - Phone without SIM 
- Enter 277634#*# or 47328545454#
  - Select 'Factory Reset'

 Code to enter UNLOCK MENU :
  - Phone wit SIM inside 
  - Enter 2945#*88110#
  Test Menu 8330 : 637664#*#
  Test Menu 8180 V10a: 49857465454#
  Test Menu 8180 V11a: 492662464663#
  Test Menu 8130-8138: 47328545454#
  Test Menu 8110-8120: 277634#*

How to factory reset your LG phone ?

Just dial "#PWE668"

Unlock code for 500 and 600 models

2945#*70001#

Unlock 8180 V10a phones lg

49857465454#

Unlock code for 8180 V11c lg phones

492662464663#

Check LG software version

Just dial "*8375#"

How to enter test screen mode on LG mobile phone ?

Just dial "2945#*#"

How to enter a secret menu in LG mobile phones ?

Just dial "2945*#01*#"

Unlock code for B1200 models

1945#*5101#

Unlock code for 5200 and 510W models

2945#*5101#

Unlock code for 7020 and 7010 models

2945#*70001#